package io.joyrpc.codec.crypto;

/*-
 * #%L
 * joyrpc
 * %%
 * Copyright (C) 2019 joyrpc.io
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import java.security.GeneralSecurityException;
import java.util.Arrays;

/**
 * 签名算法
 */
public interface Signature extends Encryptor {

    /**
     * 验证签名
     *
     * @param source 数据源
     * @param key    公匙
     * @param sign   签名
     * @return
     * @throws GeneralSecurityException
     */
    default boolean verify(final byte[] source, final byte[] key, final byte[] sign) throws GeneralSecurityException {
        return Arrays.equals(encrypt(source, key), sign);
    }
}
